00:01
In this problem, we are going to solve the system of equations by using an augmented matrix.
00:06
So an augmented matrix consists of only coefficients and constants.
00:11
So we get 2 -4 -negative -24, line, 15, and 10.
00:16
We want this equal to 1, so we're going to multiply the top row by 1 -half.
00:22
We get 1 -4, negative 1, 4, 7 .5, and 10.
00:28
We want this equal to 0 now, so we multiply the top and add to the bottom.
00:34
So we get the top rows stays the same, and then we get 0, 4 plus 4, 8, and then we get negative 20...